did you talk with the Lg technical support? I am in contact with them but I dont know if I am loosing my time. the problem is related with the new firmware. in my case I have an Lg 42lb630v with an old firmware that doesn't have this problem, but the new ones I recently bought (that have the new firmware) have this problem and, as far as I know, it is not possible to downgrade the new ones to previous firmware.